Okay so you have been zip-lining, but have you ever been zip-lining UNDERGROUND? This is the world's only fully underground zip-line and a completely unique experience. Along with the ironic height element, you get the speed, some eery views, and the feeling of enveloping darkness. The caverns themselves are an extremely impressive man-made object which also contain a ropes course. Do it. TravelMovements.com www.facebook.com/TravelMovements Twitter and Instagram: @IvansTravel Google+: plus.google.com/+Travelmovements13/posts